Joshua McKenzie created CASSANDRA-10222:
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Summary: Periodically attempt to delete failed snapshot deletions
on Windows
Key: CASSANDRA-10222
URL: https://issues.apache.org/jira/browse/CASSANDRA-10222
Project: Cassandra
Issue Type: Bug
Reporter: Joshua McKenzie
Assignee: Joshua McKenzie
Fix For: 2.2.2
The changes in CASSANDRA-9658 leave us in a position where a node on Windows
will have to be restarted to clear out snapshots that cannot be deleted at
request time due to sstables still being mapped, thus preventing deletions of
hard links. A simple periodic task to categorize failed snapshot deletions and
retry them would help prevent node disk utilization from growing unbounded by
snapshots as compaction will eventually make these snapshot files deletable.
Given that hard links to files in NTFS don't take up any extra space on disk so
long as the original file still exists, the only limitation for users from this
approach will be the inability to 'move' a snapshot file to another drive
share. They will be copyable, however, so it's a minor platform difference.
This goes directly against the goals of CASSANDRA-8271 and will likely be built
on top of that code. Until such time as we get buffered performance in-line
with memory-mapped, this is an interim necessity for production roll-outs.
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